Dynaco PAS 2 value and difference to PAS 3?

Ralph, that sounds like it could be beyond my beginner abilities unless I had directions.I think that the impedance values are kind of weird, but I can live with it for now.Very sensitive volume pot.

I saw that there is a guy that offers new "Spice" designed boards that incorporate 3 tubes on each board. Interesting!

Regenesis and Dynaco Doctor both offer new boards.
Are these updated circuits/caps or are they just replacements?

e

Emorrisiv, some are replacements, others are updates of one sort or another.

Since I don't like the unit to grow into multiple chassis, I keep the original power transformer and supply. That means that the line stage I have for it has to not draw more power than the original, which is important due to the limitations of the transformer.

If I were you I would start with simple mods and see how things sound. The nice thing about the PAS used to be that they are very simple, inexpensive and there were a lot of them. Nowdays they have gotten more rare, but they are still very easy to modify and I'm pretty sure its the most-upgraded/most-updated preamp ever made.

Just to chime in, if you disconnect the light bulb that serves as a pilot lamp, you will take a lot of current draw off of the power transformer, which is operating pretty hard as it is. Just remove it from the socket. If having no indicator bothers you, you can replace it with an LED. Directions are in one of Frank Van Alstine's bulletins. The time to do this would be when you replace the power supply as you will have easy access to the take off points.

For my money, those orange drop caps sound terrible, hard and splashy. For a few bucks you can crap can them and replace with Russian paper-in-oils or polyprop and tin foil. The difference will not be subtle, IMHO.

The Curcio boards are a complete reengineering of the circuit. I think the others are just new parts in the same circuit.